Shock detecting device

Abstract

A shock detecting device includes a housing, a weight disposed in the housing and moved by a shock which is more than a predetermined value from outside, an output member rotatably disposed in the housing and rotated in response to the movement of the weight so as to be projected from the housing and a safety mechanism being provided with a stopper pin which is formed on the weight and which contacts with the housing in an initial condition in order to maintain the weight in the initial condition, a rock lever which is rotatably supported on the housing and which being able to engage or disengage with or from the stopper pin and a first urging device which is disposed between the rock lever and the housing always for urging the rock lever so as to be engaged the rock lever with the stopper pin. According to this improved shock detecting device, it is able to maintain the high reliability of the safety mechanism with a simple structure.

What is claimed is: 
     
       1. A shock detecting device for an anti-shock safety system comprising: a housing,   a weight disposed in the housing and moved by an outside shock which is more than a predetermined value,   a firing member rotatably disposed in the housing for being rotated in response to the movement of the weight so that a portion of the firing member projects from the housing, and   a safety mechanism for preventing the weight from moving during a safety operation condition, the safety mechanism including a stopper pin which is formed on the weight and which contacts the housing in an initial condition in order to maintain the weight in the initial condition, a rock lever which is rotatably supported on the housing and which is engageable with the stopper pin, a first urging means which is disposed between the rock lever and the housing for urging the rock lever into engagement with the stopper pin, and releasing means for disengaging the rock lever from the stopper pin once the shock detecting device is installed on the anti-shock safety system.   
     
     
       2. A shock detecting device as recited in claim 1, wherein the weight is provided with a cam portion which is engageable with and disengageable from the firing member by the movement of the weight. 
     
     
       3. A shock detecting device as recited in claim 2, further comprising guide means disposed between the weight and the housing for guiding the movement of the weight in response to the shock. 
     
     
       4. A shock detecting device as recited in claim 2, wherein the weight is rotatably supported on the housing at an eccentric position which is shifted from a center gravity of the weight so that the weight is rotated around the eccentric position. 
     
     
       5. A shock detecting device as recited in claim 1, including second urging means which is disposed about a rotational shaft of the firing member for urging the firing member in a direction in which a portion of the firing member projects from the housing. 
     
     
       6. A shock detecting device as recited in claim 1, wherein the first urging means is a spring which is disposed about a rotational shaft of the rock lever. 
     
     
       7. A shock detecting device as recited in claim 1, wherein the releasing means includes a release shaft for engaging the rock lever, and a compression spring for normally urging the release shaft in a direction which prevents the release shaft from disengaging the rock lever from the stopper pin. 
     
     
       8. A shock detecting device as recited in claim 7, including a release pin formed on the anti-shock safety system for engaging the release shaft, the rock lever being engaged with the stopper pin of the weight when the release pin of the anti-shock safety system is disengaged from the release shaft. 
     
     
       9. An anti-shock safety system comprising: a release pin;   a shock detecting device comprising: a housing;   a weight disposed in the housing and moved by an outside shock which is more than a predetermined value;   a firing member rotatably disposed in the housing and rotated in response to the movement of the weight so that a portion of the firing member projects from the housing; and   a safety mechanism for preventing the weight from moving during a safety operation condition, the safety mechanism comprising a stopper pin which is formed on the weight and which contacts the housing in an initial condition in order to maintain the weight in the initial condition, a rock lever which is rotatably supported on the housing and which is engageable with the stopper pin, first urging means disposed between the rock lever and the housing for urging the rock lever into engagement with the stopper pin, and releasing means for being engaged by the release pin to disengage the rock lever from the stopper pin.     
     
     
       10. An anti-shock safety system as recited in claim 9, wherein the releasing means includes a release shaft for engaging the rock lever, and a compression spring for urging the release shaft in a direction which prevents the release shaft from disengaging the rock lever from the stopper pin. 
     
     
       11. An anti-shock safety system as recited in claim 10, wherein the rock lever is engaged with the stopper pin of the weight when the release pin of the anti-shock safety system is disengaged from the release shaft.